A composition, utility material, and method of making a utility material is disclosed. A composition having an improved setting time may include a plurality of microparticles mixed with a sodium silicate binder and an isocyanate setting agent, where the microparticle composition has a setting time of less than or equal to one hour. A utility material may be a wallboard that includes the composition.

The current invention concerns a method for preparing a coated particulate waste material, comprising the steps of: (a) providing a particulate waste material with an average particle size of between 0.1 and 5.0 mm, and (b) applying a coating material to said particulate waste material, whereby said coating material comprises at least one polymeric compound.

In a second aspect the present invention discloses a coated waste particle comprising a waste material core, and a coating surrounding said waste material core, whereby said waste material core has a particle size of between 0.1 and 5.0 mm and said coating comprises at least one polymeric compound.

A further aspect concerns a building material, comprising one or more coated waste particles.

A method for preparing an accelerator for sprayed mortar/concrete is provided. The accelerator includes an organic component, inorganic component aluminum sulfate, an initiator, and a reductant. The organic component in the form of a polymer monomer is added to concrete and polymerized into a polymer network structure in the presence of the initiator and the reductant; and the inorganic component aluminum sulfate promotes rapid hydration of the concrete to form an inorganic network structure. Such organic-inorganic interpenetrating network thickens a cement-based material rapidly to achieve strong adhesion, fast-setting and hardening properties and effectively reduces resilience of the sprayed mortar/concrete. The accelerator prepared by the method is well compatible with all sorts of cement, efficient and environmentally friendly. The organic-inorganic interpenetrating network is formed by polymerization and cement hydration, and therefore, the toughness of the sprayed mortar/concrete is improved by the organic polymer-inorganic compound accelerator.

A method for preparing an accelerator for sprayed mortar/concrete is provided. The accelerator includes an organic component, inorganic component aluminum sulfate, an initiator, and a reductant. The organic component in the form of a polymer monomer is added to concrete and polymerized into a polymer network structure in the presence of the initiator and the reductant; and the inorganic component aluminum sulfate promotes rapid hydration of the concrete to form an inorganic network structure. Such organic-inorganic interpenetrating network thickens a cement-based material rapidly to achieve strong adhesion, fast-setting and hardening properties and effectively reduces resilience of the sprayed mortar/concrete. The accelerator prepared by the method is well compatible with all sorts of cement, efficient and environmentally friendly. The organic-inorganic interpenetrating network is formed by polymerization and cement hydration, and therefore, the toughness of the sprayed mortar/concrete is improved by the organic polymer-inorganic compound accelerator.

A composition, utility material, and method of making a utility material is disclosed. A composition having an improved setting time may include a plurality of microparticles mixed with a sodium silicate binder and an isocyanate setting agent, where the microparticle composition has a setting time of less than or equal to one hour. A utility material may be a wallboard that includes the composition.

Methods, compositions, and apparatuses are provided herein that utilize polystyrene from recycled products to make a high strength composite concrete that can be used for subgrade utility vaults, utility trenches, etc. Polystyrene is a widely-used plastic that can be collected and then densified at particular parameters including temperature to transform the polystyrene to a usable form. Then, the densified polystyrene is combined with other resin materials and dry materials to form a high-strength concrete material. The amount of densified polystyrene that is combined with the other materials is critical to control shrinkage and expansion of the concrete material during manufacturing.

The invention relates to the use of a multi-component composition comprising A) a polyol component (A) comprising at least one polyol and water, B) a hardener component (B) comprising at least one polyisocyanate, and C) a solid component (C) comprising a hydraulic binder and one or more aggregates, as an early water resistant construction or repair material for constructing, repairing or refurbishing component parts, wherein the mixed and applied multi-component composition is immersed in water not later than 8 hours, preferably not later than 2 h, after application. The use as an early water resistant construction or repair material is especially suitable for component parts, which are in contact with water during operation such as offshore wind energy plants or water retaining systems, e.g. pipelines.

A polymer having a dispersing function, a preparation method therefor, and a use thereof as a cement dispersant are provided. The polymer has a structural unit a, a structural unit b, a structural unit c and a structural unit d. The structural unit a is provided by an unsaturated polyether and/or polyester, the structural unit b is provided by an unsaturated carboxylic acid or an anhydride or salt thereof, the structural unit c is provided by a silane and/or siloxane containing a polymerizable group, and the structural unit d is provided by an unsaturated sulfonic acid or a salt thereof. The molar ratio of the structural unit a to the structural unit d is 1:(5-15) and the polymer has a weight average molecular weight of 20,000 to 120,000. The polymer can be used as an oil well cement dispersant.

Provided is an additive for concrete in which viscosity of a cement composition is low and fluidity is high at an initial stage of casting even when the additive is added, and long-term strength of concrete or the like improves by the addition. A cement additive comprising a water-absorbent resin, wherein the water-absorbent resin is formed by polymerizing a monomer mixture containing no less than 50 mol % of a nonionic non-crosslinkable monomer and no less than 0.1 mol % of a nonionic crosslinkable monomer, and a content of an anionic monomer in the monomer mixture is no more than 20 mol %.

The invention relates to a multi-component composition for the manufacture of polyurethane/urea cementitious hybrid system, comprising at least one isocyanate component selected from the group consisting of monoisocyanate, polyisocyanate and NCO terminated prepolymer, at least one polyol, water, catalyst, at least one acidic additive, and hydraulic binder, wherein the acidic additive is at least one selected from the group consisting of Lewis acids, acid precursors and acidic buffers and is in an amount of 0.01 to 3 wt %, based on the total weight of the composition, to the preparation thereof, and to the use of the composition for the preparation of a flooring, waterproofing, screed, grouting, primer, wall paint, roofing or coating in construction applications.